Yeah, I've worked at home for about 25 years. I built out a little space in the garage to get the business stuff out of the regular living areas. It may only be 20 steps from my small office through the kitchen door and into the living room, but it can feel like "oh, man, great to be in here for a bit". A change of pace and environment can happen even in the confines of a small house.

The big TV location is a crucial thing. If your arrangement is open where the dining, kitchen, and some sort of family/living/den room is all open, the TV dominates 3/4 of the entire living space in terms of noise and limitations to other activities. Can be a real source of major irritation. A pair of headphones might just save a marriage smile